Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL deviFeb 21 22:42:34 syzkaller daemonFeb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:3Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL deviFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device[ 419.469809][ T30] INFO: task kworker/1:7:5908 blocked for more than 143 seconds. Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: re[ 419.482342][ T30] Not tainted 6.14.0-rc3-syzkaller-00166-g334426094588 #0 ceived NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemonFeb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488[ 419.514873][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ]: libudev: receFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: reFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488[ 419.548291][ T30] task:kworker/1:7 state:D stack:23424 pid:5908 tgid:5908 ppid:2 task_flags:0x4208060 flags:0x00004000 ]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:3[ 419.589658][ T29] kauditd_printk_skb: 8715 callbacks suppressed 4 syzkaller daem[ 419.590560][ T30] Workqueue: usb_hub_wq hub_event on.err dhcpcd[54[ 419.596434][ T29] audit: type=1400 audit(1740177754.779:204594): avc: denied { read } for pid=5488 comm="dhcpcd" scontext=system_u:system_r:dhcpc_t tcontext=system_u:system_r:dhcpc_t tclass=netlink_kobject_uevent_socket permissive=0 88]: libudev: received NULL device Feb 21 22:42Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL deviceFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daem[ 419.670783][ T30] on.err dhcpcd[54Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488[ 419.681793][ T30] Call Trace: ]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[54[ 419.691043][ T5488] audit: audit_backlog=65 > audit_backlog_limit=64 88]: libudev: reFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488[ 419.707470][ T5176] audit: audit_backlog=65 > audit_backlog_limit=64 ]: libudev: rece[ 419.715620][ T30] ived NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: re[ 419.725542][ T30] context_switch kernel/sched/core.c:5378 [inline] Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: re[ 419.725542][ T30] __schedule+0xf43/0x5890 kernel/sched/core.c:6765 ceived NULL deviFeb 21 22:42:34 [ 419.732990][ T5488] audit: audit_lost=3845 audit_rate_limit=0 audit_backlog_limit=64 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 [ 419.744712][ T5176] audit: audit_lost=3846 audit_rate_limit=0 audit_backlog_limit=64 syzkaller daemon.err dhcpcd[5488[ 419.755856][ T30] ? __pfx_mark_lock+0x10/0x10 kernel/locking/lockdep.c:234 ]: libudev: rece[ 419.757198][ T29] audit: type=1400 audit(1740177754.779:204595): avc: denied { read } for pid=5488 comm="dhcpcd" scontext=system_u:system_r:dhcpc_t tcontext=system_u:system_r:dhcpc_t tclass=netlink_kobject_uevent_socket permissive=0 ived NULL device[ 419.765389][ T30] ? lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller da[ 419.799457][ T5488] audit: backlog limit exceeded emon.err dhcpcd[[ 419.804890][ T5176] audit: backlog limit exceeded Feb 21 22:42:34 [ 419.812274][ T5176] audit: audit_backlog=65 > audit_backlog_limit=64 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL deviceFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 [ 419.854417][ T30] ? find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:5341 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL deviFeb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device[ 419.879604][ T30] ? __pfx___schedule+0x10/0x10 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemonFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488[ 419.899403][ T30] ? sched_submit_work kernel/sched/core.c:6823 [inline] Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemonFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488[ 419.899403][ T30] ? schedule+0x298/0x350 kernel/sched/core.c:6856 ]: libudev: rece[ 419.904010][ T30] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5372 ived NULL device[ 419.904076][ T30] ? lockdep_hardirqs_on+0x7c/0x110 kernel/locking/lockdep.c:4470 Feb 21 22:42:3[ 419.904100][ T30] __schedule_loop kernel/sched/core.c:6842 [inline] Feb 21 22:42:3[ 419.904100][ T30] schedule+0xe7/0x350 kernel/sched/core.c:6857 4 syzkaller daem[ 419.904122][ T30] usb_kill_urb.part.0+0x1ca/0x250 drivers/usb/core/urb.c:713 on.err dhcpcd[54[ 419.904177][ T30] ? __pfx_usb_kill_urb.part.0+0x10/0x10 drivers/usb/core/urb.c:928 88]: libudev: re[ 419.904204][ T30] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:373 ceived NULL deviFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL deviceFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daFeb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:34 syzkaller daem[ 419.998997][ T30] usb_kill_urb+0x83/0xa0 drivers/usb/core/urb.c:702 on.err dhcpcd[5488]: libudev: reFeb 21 22:42:34 syzkaller daemon[ 420.009496][ T30] usb_start_wait_urb+0x255/0x4c0 drivers/usb/core/message.c:65 Feb 21 22:42:34 [ 420.014944][ T30] ? __pfx_usb_start_wait_urb+0x10/0x10 drivers/usb/core/message.c:37 Feb 21 22:42:34 [ 420.021631][ T30] ? __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 Feb 21 22:42:34 [ 420.028892][ T30] usb_internal_control_msg drivers/usb/core/message.c:103 [inline] Feb 21 22:42:34 [ 420.028892][ T30] usb_control_msg+0x327/0x4b0 drivers/usb/core/message.c:154 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device[ 420.038644][ T30] ? __pfx_usb_control_msg+0x10/0x10 drivers/usb/core/message.c:68 Feb 21 22:42:3Feb 21 22:42:34 [ 420.047380][ T30] ? list_empty include/linux/list.h:373 [inline] Feb 21 22:42:3Feb 21 22:42:34 [ 420.047380][ T30] ? usb_hcd_flush_endpoint+0x15d/0x3e0 drivers/usb/core/hcd.c:1802 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device[ 420.058324][ T30] get_bMaxPacketSize0.constprop.0+0xd0/0x1f0 drivers/usb/core/hub.c:4817 Feb 21 22:42:3[ 420.066133][ T30] hub_port_init+0xcc3/0x3a40 drivers/usb/core/hub.c:5078 4 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL devi[ 420.076426][ T30] hub_port_connect drivers/usb/core/hub.c:5462 [inline] 4 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL devi[ 420.076426][ T30] hub_port_connect_change drivers/usb/core/hub.c:5673 [inline] 4 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL devi[ 420.076426][ T30] port_event drivers/usb/core/hub.c:5833 [inline] 4 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL devi[ 420.076426][ T30] hub_event+0x2b4f/0x4e10 drivers/usb/core/hub.c:5915 ce Feb 21 22:42[ 420.081425][ T30] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4666 Feb 21 22:42:34 Feb 21 22:42:34 Feb 21 22:42:34 syzkaller daemon.err dhcpcd[5488]: libudev: received NULL device Feb 21 22:42:3[ 420.103939][ T30] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] Feb 21 22:42:3[ 420.103939][ T30] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:716 4 syzkaller daem[ 420.108962][ T30] ? trace_lock_acquire+0x14e/0x1f0 include/trace/events/lock.h:24 on.err dhcpcd[5488]: libudev: re[ 420.117866][ T30] ? process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212 ceived NULL deviFeb 21 22:42:34 Feb 21 22:42:34 [ 420.124061][ T30] ? lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5822